Here are some results of some games i have tested, very impressed with loading times!
Cpu at 280mhz
Game: Alundra
HW scaling with normal bios
Movies around 5 fps at defualt psx cpu
Main menu @ psx cpu 10mhz is Vsinc 60 framerate 60 o_o
crashed when loading main game at psx cpu 10mhz
ingame at default cpu is around 16fps 33 vsincrate with flickering graphics when moving.
ingame with 10 mhx psx cpu VsincRate 90 framrate 18-22 max with flickering when moving.
Not sure if this is to do with the psx cpu but whenever the psx was below the default it would freeze up when changing rooms/loading.
Cpu at 280mhz
Game: Overboard (ripped to about 110 megabytes not to do with me but i got disc read errors at 17% so i gave up there but it still works lol!)
HW scaling with normal bios
Movies around 6-8 fps Vsincrate 18
Main menu at default psx cpu is 8 fps 23 vsincrate
Gets to around 6 fps with 10 mhz cpu (its sort of a 3d menu)
Loading screen is around 60-72 fps with 10mhz cpu
Main game at default cpu is around 10 fps and 22 Vsincrate
cpu at 10mhz vsincrate 72 framrate is a bit worse 9 -11 fps
Cpu at 280mhz
Game: Rapid Racer
HW scaling with normal bios
Movies around 7 fps at normal cpu
Crashed when trying to get to menu like previous version.
Will try some more games soon
Edit :
All these games are PAL.